function [channel_ps_id,channel_air_puff,channel_screen_photo_diode,channel_stim_id]=define_proj_channels(projID)


switch projID
    case 'ENU'
        % 1: shutter
        % 2: frame galvo
        % 3: PS (unused)
        % 4: visual flow
        % 5: running (=4)
        % 6: laser PD - crosstalk from ch4/5
        % 7: screen PD
        % 8: dark on/off
        % 9: grating stim ID
        
        channel_ps_id=8;
        channel_air_puff=6;
        channel_screen_photo_diode=7;
        channel_stim_id=9;
        
    case 'HOM'
        % 1: shutter
        % 2: frame galvo
        % 3: PS (unused)
        % 4: visual flow
        % 5: running (=4)
        % 6: laser PD - crosstalk from ch4/5
        % 7: screen PD
        % 8: dark on/off
        % 9: grating stim ID
        
        channel_ps_id=8;
        channel_air_puff=6;
        channel_screen_photo_diode=7;
        channel_stim_id=9;
        
        
    case 'M1'
        % 1: shutter
        % 2: frame galvo
        % 3: VR angular PS signal
        % 4: visual flow
        % 5: running linear 1st D
        % 6: air puff
        % 7: laser PD
        % 8: running rotation 2nd D
        % 9: VR position in tunnel length (x)
        % 10: VR angle facing to midline
        % 11: VR reward signal
        % 12: VR position in tunnel width (y)
        
        channel_ps_id=3;
        channel_air_puff=6;
        channel_screen_photo_diode=3;
        channel_stim_id=3;
        
    case 'VML'
        % 1: shutter
        % 2: frame galvo
        % 3: PS (full field mismatch)
        % 4: visual flow
        % 5: running
        % 6: air_puff
        
        channel_ps_id=3;
        channel_air_puff=6;
        channel_screen_photo_diode=3;
        channel_stim_id=3;
    case 'LFM'
        % 1: shutter
        % 2: frame galvo
        % 3: PS (local and full field mismatch)
        % 4: visual flow
        % 5: running
        % 6: air puff
        % 7: laser PD - crosstalk from ch6
        % 8: dark on/off (unused)
        % 9: screen PD
        
        channel_ps_id=3;
        channel_air_puff=6;
        channel_screen_photo_diode=9;
        channel_stim_id=3;
        
    case 'ACC'
        % 1: shutter
        % 2: frame galvo
        % 3: pertubations
        % 4: visual flow
        % 5: running
        % 6: air puff
        % 7: laser PD - crosstalk from ch6
        % 8: (unused)
        % 9: screen PD
        
        channel_ps_id=3;
        channel_air_puff=6;
        channel_screen_photo_diode=9;
        channel_stim_id=3;
end